similar situation is faced by me, unless you keep hopping jobs you dont get increment. with single earning things can be difficult. buying hdb would be excellent idea for you since you have pr. i cannot since i dont have pr. my sal is nearly 7k with commission but pr got rejected. you need nearly 100-150k for 3-4 room hdb and around 150-170k for exec hdb.
emi is going to come down to 900-1500 depending on what size you go for.

you must be paying rent of around 2000- 2200 $ so you will save on that.

also if you are falling short of cash. to arrange for 100-150 k
cpf can be utilized and also take some personal loan which banks are ready to lend upto 6 months salary for 5% interest which is still reasonable. the interest will only be around 1200-2000$ which is just one month rent.

..I know our friends back in india are having better life having cars and condos,and earning equivalent to us or more. but they are also subject to horrible traffic jams and frustration due to time lost on roads every day. we human beings are designed to be unhappy in any given situation.

we asked for this so lets face it.